Arnjen

Use Tools → 410 Link Unlinker to paste a list of URLs. Run a dry-run to preview, then apply. Optional: include wp_postmeta.
<h3>License</h3>
This plugin is licensed under the GPLv2 or later.

410 Link Unlinker

Removes anchor wrappers (…) in posts/pages (and optionally postmeta) when links match a provided list (e.g., 410 Gone). Keeps the visible text.

shawfactor

LH Responses Handler is a flexible wordpress waqy of handling urls in your single site or multiste that are currently handled by a 404. You can choose to redirect these responses or indeed handle them with a range of status codes (with more to be added later).
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LH Response Handler

Intercepts wordpress 404s and allows you to handle the response with a redirect or much more!

410 Link Unlinker vs LH Response Handler